On June 26, 2015, the UN marked the 70th anniversary of the signing of the United Nations Charter, which was signed by 50 countries in San Francisco. There were celebrations at UN Headquarters in New York and at the City Hall Rotunda in San Francisco. In New York, there were remarks from Deputy Secretary-General Jan Eliasson (who is known for always carrying a copy of the UN Charter in his pocket), Vice President of the General Assembly Einar Gunnarsson, and Ambassador Samantha Power, who spoke on behalf of the host country. Following those remarks there was a live joint broadcast of the official ceremony from San Francisco, highlighted by speeches by Mayor of San Francisco Edwin Lee, Governor of California Jerry Brown, Congresswoman Nancy Pelosi, and Secretary-General Ban Ki moon. All the speakers spoke about the Charter as an expression of the hope, the development and the impact of the United Nations (now with 193 Member States), and about the ideals that guide the United Nations as it works for peace, development, and human rights.

The UN also celebrated this occasion by publishing a new edition of the Charter of the United Nations in the six official UN languages, – Arabic, Chinese, English, French, Russian and Spanish – as well as six brightly colored editions in English.